Calculating-machine.



JVVEN TOR.'

5 Sheets-Sheet 2.

Patented Apr. 2, l90l.

6 -1- 3 BYM,

D. E. FELT.

GALGULATING MACHINE.

(Application led Oct. 24, 1900A 'lllllll las ATTORNEYS,

Patented Apr. 2, Ism. n. E. FELT.

CALCULATING MACHINE.

(Application filed Oct. 24, 1900.1

5 Sheets-Sheet 3.

(No Model.)

Z'lv VEN T OR.' IURR Elf-ELT BXZMQ,

Hfs TTORN EYG.

Tn: Nonms PETERS cn, Puooumo.. wAsmwnTcm, D, c.

Patented Apr. 2, I90I.

D. E.A FELT.

cALcuLATlna MACHINE.

(Applicativi: Mod 0M. 24, 1000) 5 shuts-Sheet 4.

(llo Nudel.)

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lloRR EFE/T Hfs T-roRNL-TYS "erranti DORR E. IPEIJT, F CHICAGO, ILLINOIS.

CALCULATHNGHMCHHN.

SPECIFICATION forming part of Letters Eatent No. 671,109, dated .April 2, 1901.

Application iiled October 24;, 1900. Serial No. 34,206. (No model.)

To a/ZZ whom t may concern:

Beit known that I, DORR E. FELT, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Calculating-Iriachines, of which the following is a speci'lication.

This invention relates to improvements in calculating machines, and is intended to adapt such machines to be used in making calcul-ations in British money.

The invention has been devised more especially for use in the class of machines heretofore devised by me and which have been extensively marketed and are generally known as the comptometer and the comptograph.7

The invention consists in the novel construction of parts and devices and in the novel combinations of parts and devices hereinafterset forth, and its nature will be understood from the accompanying drawings, in which- Figure lis a partial plan oi a comptometer provided with my present improvement. Fig. 2 is a longitudinal vertical section. Figs. 3, 4, and 5 are enlarged partial vertical sections showing the parts in different positions. Fig. o' is a partial liront elevation. 7 is a perspective of the carrying-pawl for carrying the shillings to the pound-column. Fig. 8 shows this pawl and the supplemental wheel whereby it is prevented from acting upon the unitpounds wheel except atalternate actu-ations. Fig. 9 is a perspective of one of the numeralwheels and its carrying-lever.

In said drawings, 10 to 15, inclusive, represent the numeral-wheels, 10 and 11 being, respectively, the pence and shillings wheels,

and the others representing the pounds.

Each is accompanied by its own row of operating-keys, all of which are designated by 16, there being eleven keys for operating the pence-Wheel, which is provided with twelve indicating spaces or figures, ten keys for operating the shillings-wheel, and nine keys for operating each of the pounds-wheels. The shillings-wheel and the pounds-wheels are all divided into ten spaces numbered from 1 to O, successively. Each series of keys and its numeral-wheel are combined with a vibrating segment-lever 17, whereby the keys may operate the wheels, and these levers carry teeth on their segmental ends which mesh with pinions 18 and through such pinions actuate the numeral-wheels, the pinions being connected to the numeral-wheels in any suitable way as, for instance, by disks 19, fast to the pinions, the pawls 190,carried by the disks, and the ratchets 191, engaged bythe pawls and joined to the respective numeralwheels by pins 192. These pins are equispaced and agree in number with the number of spaces into which the wheels are divided, so that the pins may receive the impulses of the carrying-levers, and thus form part of the carrying mechanism. The strokes imparted to the segment-levers by the keys are graduated according to the power of the keys in the usual manner.

`W ith each of the numeral-wheels except the highest is a carrying-lever, that for carrying from the pence-column to the shillings being shown at 20, that for carrying from the shillings-column to the units oi'` pounds being shown at 21, and the others for carrying from the one-pound column to the next column aboveA not being shown. All the levers are alike in construction, but lever 20 carries when the pence-wheel reaches or passes 12, while all the others, except lever 2l, carry when their respective wheels reach or pass 0. The levers are made much like the lever M of my Patent No. 371,476 of October 11, 1887, are pivoted on the rod 23, and are actuated by springs 24., in which the necessary power is stored preparatory to each carrying operation by the cams on -the nnineral-wheels, such cams acting through the medium of arms 26 on the levers to force the levers backward gradually,and thus'distend the springs. Each lever is provided with a push-pawl 27,engaging pins 192 of the numeral-wheel next higher in order, and this pawl is pivoted to the lever and provided with a spring pressing it down on the pins. The springs 24 act as soon as the arms 26 pass off the highest part of cams 25.

I/Vith lever 2l, which carries the shillings to the lowest or unit column of pounds, I employ an auxiliary device, which is actuated by said lever each time the wheel 11 reaches or passes 0, but which prevents the lever from moving wheel 12 except at alternate actuations oi' the lever. In other words, the auxiliary device prevents any carrying of IOO evince shillings to pounds except at each second rol tation of the shillings-Wheel, and this is the principal function of the device. In the pre ferred form the device is a rotatable disk 30, arranged on the upper end of a stationary support 31 between Wheels 11 and 12, and its periphery is cut so as to form several series composed of projections 32, numhenspaces 33, and notches or 1olank spaces Se, all relatively arranged as shown. i prefer to divide the periphery into four such series, in which case the disk will have eight positions and should be provided with eight holes to receive the overthrow-preventing spring-detent 35, also mounted on the support 31. Cooperating With the disk 30 are tivo paivls 36 and 37, ooth attached to or formed on the push-pand 27 of lever 21. One of these pawls 3G is notched and projects in advance of pawl 37, and the latter is also located laterally of pawl 236, loeing formed by -pending over or doubling the metal of the push-pand. The number-spaces are preferably marked with the iigure 1, as shown, so that when t-hey come in proximity to the shillings-Wheel that figure may he read with such one of the ures on the Wheel as is at the sightoii1ening of the machine, thus indicating that the shillings registered in the machine number, say, iiiteen or other number in excess of ten.

The operation of the auxiliary Wheel and the pawls 36 and 37 is as follows: The disk 3() is so located that the projections move into the path of the notched pawl 36, so that the latter both engage and ride on said projections. 5i/hen the paivl is positioned on one of the projections 32, it will at the next following actuation of the carrying-lever by its spring impart a one-eighth turn to the disk, and the projection at the saine time prevents the paivl from falling lov.7 enough to enable pavvl 27130 engage the pins 102, so that no carrying of the numeral-Wheel occurs at the movements occurring While the paivl rides on projection The eighth of a turn given the disk bythe paw136,as stated, leaves the disk in such position that when 't' e carrying-lever next moves back to store up power in its motor-spring the acting ends o1' the pavvls will fall to the plane which permits the carrying` of the numeral-Wheel as soon as paivl 36 has moved off from projection 32, and the paw-1.37 enters the blank-space Se at the saine time. With the pawls in this position it will be seen that the carrying-lever when it is next operated by its motor-spring will actuate the numeral-Wheel 12, and also that the pavvl 37 will turn the disk 30 another eighth of a turn and bring the next projection 32 into position to lift and sustain the pawl 36, so that at the next succeeding or third operation of the carrying-lever noactuation of the numeral-Wheel occurs. All subsequent operations are but mere repetitions of those set forth, and as will he seen they result in the carrying of the numeral-wheel at each second or alternate revolution of the numeral- Wheel l1.

Of course l do not wish to he limited to an auxiliary numeral-Wheel having four projections and four notches or spaces to engage the paivls, as obviously the Wheel may have any desired number of such devices and should receive a corresponding amount of movement at each impulse.

Fig. 3 shows the carrying devices in position to operate the nu meral-Wheel and pawl 37 in the disk-notch Si. Fig. 1 shows the position of the lever and paivlsujust previous to one of the actuations in which the auxiliary Wheel is moved without any movement being given tothe niimeral-\vheel, and Fig. shoi 's the positions at the conclusion of the saine.

Each numeral-wheel has a detent `1-7 ene gaging the pins 192 and stopping the motion of the Wheel, and this detent is Withdrawn at each actuation of the wheel hy providing it with a lng L11, projecting laterally and riding on the periphery of the disk 15) of the same wheel. A shoulder 40 is formed in the periphery of the disk, and the lng normally lies under it, and inasmuch as the periphery hcioiv the shoulder slopes gradually outward to the full diameter of the disk it will he .s en that soon as the disk oegins to rotate iin-- der the power of the segmeilt-lever the lug` will be forced backward, so as to withdraw the detent from its acting position. The detent is also withdrawn by the carrying-lever preparatory to a carrying operation.

The shillings-Wheel 1.1 liahle to receive complete rotations from the strikii'ig of the ten-shillings key, and ol' course the disk 10 of that wheel receives like complete rotations. In these complete rotations of the disk, unless means of preventation were provided, the detent-lug Will engage the shoulder et() When the segment-lever reaches the limit of its downstroke, so that the disk and its pinion cannot then turn in the reverso direction and allow the segn'ient-lever to return np- Ward. To ohviate this action, i provide means for preventing this engagement at such times, and these means are throivn into action hy the segment-lever as it nears the limit of the doivnstroke. r1heconstrnction l have adopted consists of a frame 42, pivoted on rod A'1-3, having an up vard arm L14- extending up into the path of the segment-lover and adapted to be depressed by such lever, and also having a loosely-jointed link a5 extending upward and supporting the pivot of the detent. A, spring` 46 acts on the frame 4:2 and tends to keep it in its normal position. lVhcn the segment-lever depresses the arm 414:, it also draws the detent-lug away from its acting position, so that at themoment the shoulder of the disk passes the lug tl the latter is held out of action. The detent is allowed to re turn to its normal josition, however, as soon as the segment-lever moves up and releases its pressure on arm 4.4, and conseqnentlytho IOO detent may act at the conclusion of the reversed action of the disk.

I claiml. In a machine for making computations in British money, the combination with the shillings-Wheel and pounds-Wheel of carrying mechanism imparting movement to the pounds-Wheel at the alternate revolutions only of the shillings-Wheel and embracing a horizontal rotating disk 30, substantially as specified.

2. I-n a machine for making computations in British money, the combination With the shillings-Wheel and pounds-Wheel of carrying mechanism imparting movement to the pounds-Wheel at the alternate revolutions only ofthe shillings-wheel and embracing a horizontal rotating disk 30 carrying iigures adapted to be read in conjunction With the figures upon the shillings-wheel, substantially as specified.

3. In a machine for making computations in British money, the combination With the wheel registering the shillings having ten spaces and positions and the Wheel registering the units of pounds, of carrying mechanism embracing a pawl actuated at each revolution of the shillings-wheel, and an auxiliary disk interposed between the paWl and the pounds-wheel and engaging the pawl and holding it out of action at each of its alternate actuations, substantially as specified.

4L. The combination With the push-pawl of the carrying mechanism belonging to the wheel registering the shillings, of a detachable disk engaged by and operated by paWls carried by said push-pawl and acting to keep said push-pawl out of action at alternate revolutions of the Wheel, substantially as specified.

5. The combination with the push-pawl of the carrying mechanism of the shillingswheel, and pawl 36 attached to and controlling said push-pawl, of disk 30 having projections engaging said pawl 36 and acting through such projections to keep the pushpawl out of action at alternate revolutions of the wheel, substantially as specified.

6. The combination with the push-paw] of the mechanism for carrying shillings to pounds, of an automatically-operated rotating device engaging and lifting said paWl at each alternate actuation thereof, and means whereby the lifting device may be rotated by the pawl, substantially as specified.

7. The combination with the shillings- Wheel and mechanism for carrying from it to the pounds-Wheel, of a disk mounted upon an axis not coincident with that of the shillings-Wheel and located in proximity to said Wheel so that the ligures thereon may be read in conjunction With those on the Wheel, substantially as specified.

8. The combination with the shillings- Wheel and mechanism for carrying from it to the pou nds-Wheel, said mechanism embracing a movable controlling device having an axis arranged at an angle to that of the wheel and also having figures adapted to be read With those on the Wheel, substantially as specified.

9. The combination With the shillings- Wheel and mechanism for carrying from it to the pounds-Wheel, of the disk 30 mounted upon an axis standing at an angle to that of the Wheel and constructed and operating substantially as set forth.

10. The combination With the shillings- Wheel and its carrying mechanism, the latter embracing the disk 30 having the projections, the number-spaces and the blank spaces, and pawls 36 and 37, substantially as specified.

ll. The combination with the disk 19 of the shillings-Wheel, the segment-lever, and the pinion actuating the disk, of the detent 47 and lug thereon, and means for preventing said detent-lug from acting at the end of the downstroke of the lever When it imparts a complete revolution to the disk,substantially as specified.

l2. The combination with the shillings- Wheel, the segment-lever thereof, and the key whereby said lever actuates the lever in giving a complete revolution to the Wheel, of the detent 47, disk 19 arrested by said detent, and means for preventing said detent .from acting on the disk at the end of the downstrokes of the lever imparting a complete turn to the disk, substantially as specified.

DORR E. FELT.

Witnesses:

RDW. S. EvARTs, H. IWI. MUNDAY. 

